Strange side effect of attaching a variable as attribute to another variable in 6.2.0

Dear NCL team,

since the update to version 6.2.0 I have some strange errors in my scripts. I found that attaching a variable as attribute to another variable has side effects on the variable that were not there before. Here is an example:

ncl 0> x = new (2, float)
ncl 1> print(any(ismissing(x)))
(0) True
ncl 2> y = True
ncl 3> y@x = x
ncl 4> print(any(ismissing(x)))
(0) False
ncl 5> print(x)

Variable: x
Type: float
Total Size: 8 bytes
            2 values
Number of Dimensions: 1
Dimensions and sizes: [2]
Coordinates:
Number Of Attributes: 1
  _FillValue : 9.96921e+36
(0) 9.96921e+36
(1) 9.96921e+36

x contains only missing values. Checking that before attaching it to y confirms that. Checking x again for missing values after it has been attached to y shows the strange behavior. The missing values inside of x are no longer detected as missing values, but the _FillValue attribute remains unchanged but is ignored. In version 6.1.2 attaching an attribute to a variable don’t seems to have this side effect.

Thanks in advance for looking into that!
Robert
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Received on Thu Apr 10 05:53:15 2014